【Jquery】asp.net中利用Jquery+Ajax+Json实现无刷新分页的实例代码-Ajax-无刷新分页

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asp.net中利用Jquery+Ajax+Json实现无刷新分页的实例代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Web.UI;
using System.Web.UI.WebControls;
//新增  
using System.Web.Script.Serialization;
using System.Text;

public partial class SupplyAJAX : System.Web.UI.Page
{
    protected static List<Student> StudentList=new List<Student>();
    protected static int RecordCount=0;
    protected static DataTable dt=CreateDT();
    protected void Page_Load(object sender, EventArgs e)
    {
        switch (Request["type"])
        {
            case "show":
                #region 分页配置
                //具体的页面数
                int pageIndex;
                int.TryParse(Request["pageIndex"], out pageIndex);
                //页面显示条数
                int PageSize=Convert.ToInt32(Request["pageSize"]);
                if (pageIndex==0)
                {
                    pageIndex=1;
                }
                #endregion
                DataTable PagedDT=GetPagedTable(dt, pageIndex, PageSize);
                List<Student> list=new List<Student>();
                foreach (DataRow dr in PagedDT.Rows)
                {
                    Student c=new Student();
                    c.Id=(Int32)dr["Id"];
                    c.Name=dr["Name"].ToString();
                    c.Sex=dr["Sex"].ToString();
                    list.Add(c); 
                }
                string json=new JavaScriptSerializer().Serialize(list);//这个很关键，否则error
                StringBuilder Builder=new StringBuilder();
                Builder.Append("{");
                Builder.Append("\"recordcount\":" + RecordCount + ",");
                Builder.Append("\"data\":");
                Builder.Append(json);
                Builder.Append("}");
                Response.ContentType="application/json";
                Response.Write(Builder.ToString());
                break;
            case "getcount":
                Response.Write(dt.Rows.Count);
                break;
            case "add":
                break;
            case "update":
                break;
            case "delete":
                break;
        }
        Response.End();
    }

    #region 模拟数据
    private static DataTable CreateDT()
    {
        DataTable dt=new DataTable();
        dt.Columns.Add(new DataColumn("Id", typeof(int)) { DefaultValue=0 });
        dt.Columns.Add(new DataColumn("Name", typeof(string)) { DefaultValue="1" });
        dt.Columns.Add(new DataColumn("Sex", typeof(string)) { DefaultValue="男" });
        for (int i=1; i <=1000; i++)
        {
            dt.Rows.Add(i, "张三" + i.ToString().PadLeft(4, '0'));
        }
        RecordCount=dt.Rows.Count;
        return dt;
    }
    #endregion

    /// <summary> 
    /// 对DataTable进行分页,起始页为1 
    /// </summary> 
    /// <param name="dt"></param> 
    /// <param name="PageIndex"></param> 
    /// <param name="PageSize"></param> 
    /// <returns></returns> 
    public static DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize) 
    { 
        if (PageIndex==0) 
            return dt; 
        DataTable newdt=dt.Copy(); 
        newdt.Clear();   
        int rowbegin=(PageIndex - 1) * PageSize; 
        int rowend=PageIndex * PageSize; 
        if (rowbegin >=dt.Rows.Count) 
            return newdt; 
        if (rowend > dt.Rows.Count) 
            rowend=dt.Rows.Count; 
        for (int i=rowbegin; i <=rowend - 1; i++) 
        { 
            DataRow newdr=newdt.NewRow(); 
            DataRow dr=dt.Rows[i]; 
            foreach (DataColumn column in dt.Columns) 
            { 
                newdr[column.ColumnName]=dr[column.ColumnName]; 
            } 
            newdt.Rows.Add(newdr); 
        } 
        return newdt; 
    } 

    /// <summary> 
    /// 获取总页数 
    /// </summary> 
    /// <param name="sumCount">结果集数量</param> 
    /// <param name="pageSize">页面数量</param> 
    /// <returns></returns> 
    public static int getPageCount(int sumCount, int pageSize) 
    { 
        int page=sumCount / pageSize; 
        if (sumCount % pageSize > 0) 
        { 
            page=page + 1; 
        } 
        return page; 
    } 
 

    public struct Student
    {
        public int Id;
        public string Name;
        public string Sex;
    } 
}

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